Dental broach.



L. L. PUNK.

DENTAL BROAGH. AIPLIOATION FILED 00'1.16,1911

1,022,838. Patented Apr. 9, 1912.

Kauzkc COLUMBIA PLANOGRAPH cm, WASHINGTON, D. I;

LEVI L. FUNK, or cHIoAGo, ILLI1\ToIs.

DENTAL BROACI-I.

Specification of Letters Patent.

Patented Apr. 9,1912.

Application filed October 16, 1911. Serial No. 654,990.

Illinois, have invented certain new and use-' ful Improvements in DentalBroaches, of

which the following is a specification.

This invention relates to broaches which are used by dentists as basesaround which cotton or silk fiber is wrapped for the purpose of cleaningthe root canals in teeth, for packing pyorrhea pockets and fistulas, andfor other purposes. And the princlpal object of this invention is toobtain a broach by means of which saidfiber may be forced to the apex orends of'the root canals.

A further object of this invention is to obtain a broach around whichcotton or silk fiber prepared in the ordinary way for dentists use maybe closely wrapped.

A further object of the invention is to obtain a broach which, whencotton is wrapped around it and it is forced into the root canal of atooth or other place and then withdrawn therefrom, the fiber which is sowrapped around it will. be withdrawn with the broach; but whichwillnevertheless permit said fiber to be easily removed therefrom after itswithdrawal from said canal or other place.

A further object of the invention is to obtain a broach of the characterdescribed which may be easily made to follow the walls of the root canalof a tooth, whether said'canal is straight or curved, tothe end thereof,both for the purpose of cleaning ,said canal of foreign matter, as pusor blood cells, and for the purpose of depositing and tamping cotton insaid canal at the end thereof, after the. same has been properlytreated.

In the drawing Figure 1 is an elevation V of abroach embodying thisinvention. Fig.

2 is a modification of the broach illustrated in Fig. 1. Fig. 3 is. anend view of the broach embodying this invention, and Fig.

to beyond the axial line of said broach, and the face obtained therebyis hollowed out, or made convex, as is indicated by broken line 6, Figs.2 and 4:. The other side of the broach, opposite to the cut away portionwhich is indicated by b is also cut away, as is indicated by line b. Theend of the broach is rounded slightly on the sides which are the ends ofapex b, as is shown at 6"". The end of the broach is thus made apeculiar chisel shape, one face of said end being larger than the otherand convex. The end indicated by line b is easily engaged with fiber insuch manner that said fiber will not become disengaged as said end isforced into the tortuous canal of a tooth.

The peculiar chisel shape which is given to the end of the broach byextending face 6 thereof beyond the axial line of said broach is for thepurpose, that when-it is forced into a curved root canal, in case theend 6 engages with one of the walls of the canal, by turning said broachin the canal, say one fourth or one half way around, said end will bedisengaged from said wall and the broach can be forced farther in,together with the fiber which is thereon. The end is rounded at 72""also to prevent, as far as possible, engagement of the ends of edge I)with the walls:of the canal;

C, C, are short raised edges extending along and partially around thebroach which are forcedout from the body of the broach.

The raised edges G commence a short distance back of the end of thebroach and are not continuous. The forcing out of said edges results inthe making of shallow grooves with one of the edges thereof raised andragged as is shown at,v B, Fig. 1.

E, Fig. 1, are irregular ragged cuts on the periphery of the broachbetween the cuts C thereon. The cuts C and E are respectively made toforce a portion of the body of the broach out therefrom and no part.

of said body is cut away or removed from the said broach. Said cuts Egive a holding quality to said broach so that the fiber wrapped aroundit is held in place thereon when the broach is forced into a canal rootof small diameter.

The device illustrated in Fig. 4 does not have thereon the cuts G or theirregular ragged cuts E and is used for depositing fiber in the canalroots of teeth and for tamping said fiber. 4

I claim 1. A broach, provided with a chisel shaped end having two faces,and said end concave at the intersection of said faces.

2. A breach provided with a chisel shaped end, having two faces, one ofthe faces of said end concave and extending beyond the axial line of thebroach and said 7 end concave at the intersection of said faces. 3. Abroach provided .With a chisel intersection.

LEVI L. FUNK. In the presence of- CHARLES TURNER BROWN,

G. A. ADAMS.

Gopies of this patent may be obtained for five cents each, by addressingthe dommission'er of Patents.

Washington, D. G.

